SIKORSKY MODEL S-58 AND S-58T SERIES HELICOPTERS
SIKORSKY Model S-58 and S-58T series helicopters (Docket No. 93-SW-18-AD; Amdt. 39-9226; AD 95-10-09) - requires removal and replacement of the transmission main gearbox ring gear within certain time intervals and establishes a retirement life for the ring gear. This amendment is prompted by reports...
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